GPU client side changes for GpuMemoryBuffers

gpu/command_buffer/client/gpu_memory_buffer_tracker.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GPU_COMMAND_BUFFER_CLIENT_GPU_MEMORY_BUFFER_TRACKER_H_
+#define GPU_COMMAND_BUFFER_CLIENT_GPU_MEMORY_BUFFER_TRACKER_H_
+
+#include <GLES2/gl2.h>
+
+#include "../client/hash_tables.h"
+#include "base/basictypes.h"
+#include "gles2_impl_export.h"
+
+namespace gpu {
+class GpuMemoryBuffer;
+
+namespace gles2 {
+class ImageFactory;
+
+// Tracks GPU memory buffer objects on the client side.
+class GLES2_IMPL_EXPORT GpuMemoryBufferTracker {
+ public:
+  // Ownership of |factory| remains with caller.
+  explicit GpuMemoryBufferTracker(ImageFactory* factory);
+  virtual ~GpuMemoryBufferTracker();
+
+  GLuint CreateBuffer(
+      GLsizei width, GLsizei height, GLenum internalformat);
+  GpuMemoryBuffer* GetBuffer(GLuint image_id);
+  void RemoveBuffer(GLuint image_id);
+
+ private:
+  typedef gpu::hash_map<GLuint, GpuMemoryBuffer*> BufferMap;
+  BufferMap buffers_;
+  ImageFactory* factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferTracker);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_CLIENT_GPU_MEMORY_BUFFER_TRACKER_H_